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Determine whether each of these functions defined on a set of integers is inversible. Explain your answer. a) f(x)=2x+1 (2 marks) b) f(x)=(x+1)(x1)

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Determine whether each of these functions defined on a set of integers is inversible. Explain your answer. a) f(x)=2x+1 (2 marks) b) f(x)=(x+1)(x1)

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